On Wed, 2010-03-17 at 18:48 -0400, Felix Miata wrote: > # xrandr --output VGA1 --mode 1600x1200 > xrandr: cannot find mode 1600x1200 Which means there's not a 1600x1200 mode listed on that output. > # xrandr --addmode UXGA 1600x1200 > xrandr: cannot find output "UXGA" This attempts to add a mode named "1600x1200" to an output named UXGA. You have no such output. > # xrandr --addmode VGA1 1600x1200 > xrandr: cannot find mode "1600x1200" Modes don't exist a priori. Create the mode you want and then add it to the appropriate output. % gtf 1600 1200 60 | grep Mode Modeline "1600x1200_60.00" 160.96 1600 1704 1880 2160 1200 1201 1204 1242 -HSync +Vsync % xrandr --newmode 1600x1200 $(gtf 1600 1200 60 | grep Mode | read a b c; echo $c) % xrandr --addmode VGA1 1600x1200 Note that mode names have no semantic meaning. They're just strings. Use gtf(1) to generate mode timings for CRTs, and cvt(1) for LCDs. - ajax
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